Automatic turning machine



May 10, 1932. D. TURCOTT 1,357,391

AUTOMATIC TURNING MACHINE Filed NOV.4, 1929 4 Sheets-Sheet 1 May 10, 1932. D. TURCOTT AUTOMATIC TURNING MACHINE Filed Nov.4, 1929 4 Sheets-Sheet 2 May 10, 1932. TURCQTT 1,857,891

AUTOMATIC TURNING MACHINE Filed Nov.4. 1929 4 Sheets-Sheet 3 By I May 10, 1932. D. TURCOTT 1,857,391

AUTOMATIC TURNING MACHINE Filed Nov.4. 1929 4 Sheets-Sheet 4 Patented May 10, 1 932 UNITED DAVID 'runcor'r, or BELo T W SCoNSIN, Assmnoa T0 yamnsymnnrcanmacnmn 7 COMPANY; or BELorr, wxsconsm, A conronarron or DELAWARE 'i monme TURNING MACHINE 'a pncationfm n mber ,1192; sjeiiai"n .'f4o4;59e; f f

This invention has to do with automatic wood-turning lath'es of the type in which the workis brought into engagement with rotat- 7 ing knives and is rotated on its'own axis while in such engagement.-

f i I The primary *object of the/invention is to providea novel work-handlingldevi'ce for use with such a lathe; which device-"acts before the cutting operation to'centerthe work with. respect to the chucks of the-head and tail stocks and acts after the cutting operation tounloadthe' work from'the chucks? While the foregoing statement is indicative in agene'ral way of the nature of theinv en- A. 'tion, other objects and advantages will be evident tothose skilledinthe art upona full understanding of the construction, arrangementand'operation of the new centering and unloading device. Q

One form of the invention is presented herein for the purpose of'exemplification, but it will of course be understood that the invention is capable of beiing'einbodied in other structurally different forms" coming equally: within the scope of the appended claimsr In the accompanying drawings: x v

1 Fig.1 is a perspective view of a "lathe equipped with the centering and unloading device of theinvention;' k

Fig. 2 is a vertical transversel section through the lathe, showing the device the act of positioningthe. uncut work in centered relation to the chucks;

v Fig. 3 's a similar'section', showing the car- V I, "bracket 23.,Si1nilar recesses 32,33 and 34 work fromthechucks'; and p Fig. 5 is a section through one of the two duplicate units-of the device, taken on'the line 55 of Fig;- 2.

The lathe shown in the drawings includes a mainframe 10, a set of rotating knives 11 supported by the frame,-a carriage 12 pivoted at 13 to the frame for movement towardand away from the latter, a headstock "14011 the carriage having'a'rotatingchu'ck 15, a'tail' the chucks 15 and 17 thep' stock 16 on the carriagehavin'g -a' rotating chuck 17'; and *ahand lever; 18 pivoted at 19' tothe' frame and connected by alink'20'to the fcarr'iagelfor moving the latter tobrin'g the, "uncut piece of rotating-work gripped between 5 the chucks 15 and '17 into engagement with the rotating knives- 11.

' The device which forms the subject matter of the present invention isin the ,nature of, a

lathe attachment and consists oftwospaced s'piders 21 and 22 whichare" duplicates '0 ends ofeach piece of work-placed in the lathe.

iciated operating parts will therefore'be suflicient, it being understood that, such descriptionappli'es as well tothe' spider 21.- I

description ofQthe spider '22 and its asso- 7 each otherand act inunison upon the opposite The spider 12 ,is rotatably' mounted-at its center on a bracket 23' whichis ad-justably' attached tothe top 'ofthe carriage 12 by bolts 24; The spider is; provid'ed abou't its periphcry with four L-s'liapedwork-engagingarms 255 26, 27and 28: which serve in theorder of their numberingto centerswith respect to y 'cessively' operatedupon by the lathe? Whenthecarriage 12 1's swung away from thefitame, 10 to {receive an uncut piece of work between thechucks, the arm 25 assumes I the position shown in Fig. 2, in which position it is temporarily held against accidental displacement by a spring pressed index;

30 in "a stationary disk 31 attached to the ingbal1f29 in'thejhubfofthe spiderjsee Fig.

5,";which ball seats in a cone-shaped recess areprovided inthe1disk31 for accurately positioning the otheriarms lwhen the latter subsequently assume the centering' p osition in which the arm '25 shown in v F1g.. 2j. Q

Thespider is provided at one side with 'four 'latera-lly' projecting cam'rollers 35", 3 6,

37 an'dl 38which c'oact with the opposite edges 39 and 40 of a blade sh'aped cam {ll and also- 445 ofthefranie 10, "and is provided atthe I lower-extremity of'the edge eiOwitli an adreceptacle.v

' toward the frame. 7

justably positioned screw 45 with which rollers also coact.

The device operates as follows: Starting with the carriage 12 of the lathe the swung away from the frame 10 into loading position,,as shown inFig; 2, an uncut piece of worked is placed? in the angles of the arms of the spiders, which arms are so adjusted on the spiders as to accurately center the workiwith respectto thezch-ucks' l'5' and 17 2 After theicliucks have heen caused to grip the ends of the work firmly, the carriage is swung As soon as the carriage. starts to. advance toward the frame, therolle'rs ride'onto and, over: the edges 40 of -thecams 4511, there- ;hyzrotatingthe@spiders part of one revolution in; a counterclockwisedirection to swing; the arms 25 downwardly away, from: the work Jintothe position! shown in Fig. .3. 1 The cutting foperation then: takes place upon the 2. work. 1 i

? lfra1ne again. Assoon as thecarriage-com- After the cutting operation-has completed, the carriage is swung away from the mences itsfreturni movement; the. outer ends oflthe fingers '42, being; pressedinto the paths of the rollers: 38, engage with the latter and irotate the spiders; agpant ofoneErevolution in a clockwisedirection intothe position shown a in.Eig..4;, thereby bringing thenollers 35 into opposition .withihe edges 39 of the camsAl, whereuponv the"; rollers. 35 engage with the edges 39- and rotate the spiders still farther in. aclockwisef direction into the position Qwhereinfthe rollers fid engage. with the ends next piece of uncut work.

ofthescre ws and bring the spiders to rest 1 with the next; arms 1. 26 in; correct position-to 40 centerthe nextpiece ofv work. During the In the particular embodiment ofithe invention presentedlherein .forjthe: purpose of exemplifi catiomrthe chuck.17 of the-tail stock is pneumatically-operated in accordance; with the invention disclosed; andtclaimed .inmy c'oepending application; Serial No. $04,595,, filed November ,4, 1929; and is caused to be antomaticallyretractedI from the work: by the movement of; the carriage away; from: the

knives just before the work is engaged and lifted from between the chucks by the unloading arms.

I claim: 1. In a lathe, a pair of chucks between ,whiehe-the work is held during-the cutting operationya pair of arms, for supporting the work in centered'relation to the chucks before the work is engaged by the chucks, means forautomat'icallylowerihgthe arms froin' the work prior to -the uttingoperation, and means for automatically raising the arms beyond tlieircentering positions after the cuttingi operation to remove the work from between the chucks. I

,2; Inga lathe, afframe,- a pluralityi of-knives mounted for rotary; *movement- --on theif'rame,

H a carriage hinged; ton moyement toward and a ways fromwthc frame; head T and taiL-stook's on the carriage having axially aligned' chucks forholding' a; piece ofvworkthe'nebctween, a

pairof rotatably. mounted spiders on the canriagehaiving spacjed-arms for supporting the work in: alignment with the chucks, and-coacting means; on t-hej frame: and ica-rlii gczfor -automatically-1mov ngwthe arms away from the work priorv toithecutting' operation: and

movingthe workout frombetween therchucks upon; completion? of the cutting operation. 8;"1-11 ala-thafla pair oflchucksj betwecng which the work isheld during the cutting operation, a-p'ainof ,arms-fo1'. supporting the work iii-centered relation-to the; chucks; be;-

fore the work is engaged by the:cliuoks, .means for automatically; withdrawing the a'rms from thework prior-"to. the zcuttingroperation,

and means for automatically returning the varmsand!1carnyjing them beyondithe line o-f th'e'chnck axes aften-thie cuttingi operation -to removethe workfrom'betwjeen' the-zchu'cksi;

4. In a lathe, a pair of chucks between which the: work is: held during the 1 cutting operation, means for supporting the work in centered relation to: the chucksbefore the work is engaged bypthe chucks;meansafor automatically withdrawing said? supporting mean's'fromathe work. priors-t'o the :cutting'op *eration; and means-for automatically returnicarrying it beyond the line of the chuckaxes after asthez cutting; operation to remove" the work-frombetweentherichucks;

5. In a lathe, a frame; aplura-lity ofk'knive's .mountedifor rotary movement onithe frame,

a-carriagezhmgedfor movementtoward and away from the frameg'head-and' tail stocks onthe carriage havingaxially aligned chucks for holding; apiece of I work therebetween, a pair of rotatably mounte'd spiders onthe carriage havingispaced arms for: supporting the work in alignment with the chucks, :a'n'd coacting means onthe. frame andcarriage -for g automatically 'movingthe arms away from the work prior 'to the cutting operation J and automatically-moving; theuarms' hack-:tovt'he s work to remove the latter from between the chucks upon completion of the cutting operation.

6. In a lathe, a frame, a cutter mounted for rotary movement on the frame, a carriage hinged for movement toward and away from the frame, head and tail stocks on the carriage having axially aligned chucks for holding a piece of work therebetween, a pair of rotatably mounted spiders on the carriage having circumferentially spaced arms pro vided with L-shaped seats for supporting the work in alignment with the chucks, and means for turning the spiders first in one direction and then in the other, whereby to withdraw the seats from the work prior to the cutting operation and return the seats to the work to eject the latter from between the chucks after the cutting operation.

7. In a lathe, a frame, a rotary cutter mounted on the frame, a carriage, a pair of rotary chucks mounted on the carriage, means for moving the carriage toward or away from the frame to advance or retract the chucks with respect to the cutter, means for supporting a piece of work in centered relation to the chucks before the latter are advanced, means for withdrawing said supporting means from the work when the chucks are advanced, and means for returning said supporting means to the work to discharge the latter when the chucks are retracted.

8. In a lathe, a frame, a rotary cutter mounted on the frame, a carriage, a pair of rotary chucks mounted on the carriage, means for moving the carriage toward or away from the frame to advance or retract the chucks with respect to the cutter, means for supporting a piece of work in centered relation to the chucks before the latter are advanced, means for withdrawing said supporting means from the work when the chucks are advanced, and means for returning said supporting means to the work to discharge the latter when the chucks are retracted, said withdrawing means being automatically actuated by the movement of the carriage toward the frame.

9. In a lathe, a frame, a rotary cutter mounted on the frame, a carriage, a pair of rotary chucks mounted on the carriage, means for moving the carriage toward or away from the frame to advance or retract the chucks with respect to the cutter, means for supporting a piece of work in centered relation to the chucks before the latter are advanced, means for withdrawing said supporting means from the work when the chucks are advanced, and means for returning said supporting means to the work to discharge the latter when the chucks are retracted, said returning means being automatically actuated by the movement of the carriage away from the frame.

10. In a lathe, a frame, a rotary cutter mounted on the frame, a carriage, a pair of rotary chucks mounted on the carriage, means for moving the carriage toward or away from the frame to advance or retract the chucks with respect to the cutter, means for supporting a piece of work in centered relation to the chucks before the latter are advanced, means for withdrawing said supporting means from the work when the chucks are advanced, and means for return ing said supporting means to the work to discharge the latter when the chucks are retracted, said withdrawing and returning means being automatically actuated by the movement of the carriage toward and away from the frame.

11. In a lathe, a frame, a rotary cutter mounted on the frame, a carriage, a pair of rotary chucks mounted on the carriage,

means for moving the carriage toward or away from the frame to advance or retract the chucks with respect to the cutter, means for supporting a piece of work in centered relation to the chucks before the latter are advanced, and means for causing said supporting means to discharge the work from between the chucks after the latter have been retracted.

12. In a lathe, a frame, a rotary cutter mounted on the frame, a carriage, a pair of rotary chucks mounted on the carriage, means for moving the carriage toward or away from the frame to advance or retract the chucks with respect to the cutter, means for supporting a piece of work in centered relation to the chucks before the latter are advanced, and means for causing said supporting means to discharge the work from between the chucks after the latter have been retracted, said supporting means being so positioned when removing the work as to allow the latter to slide ofi' the same.

13. In a lathe, a frame, a plurality of knives mounted for rotary movement on the .frame, a carriage hinged for movement toward and away from the frame, head and tail stocks on the carriage having axially aligned chucks for holding a piece of work therebetween, a pair of rotatably mounted spiders on the carriage having spaced arms for supporting the work in alignment with the chucks, and coacting means on the frame and carriage for automatically turning the spiders first in one direction and then in the scribed my name.

DAVID TURCOTT. 

